A double-pass spiral-wound diffusion dialysis membrane module and its preparation method
A technology of diffusion dialysis and membrane modules, applied in the field of spiral separation membrane modules and their preparation, can solve the problems of short process flow and low continuous production efficiency, and achieve the effects of fast flow speed, easy rolling operation and low automation requirements.
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Embodiment 1
[0022] Example 1: Preparation process of a spiral-wound diffusion dialysis membrane module with a membrane area of 1.1 square meters
[0023] figure 1 It is a schematic diagram of the overall structure of the double-pass spiral-wound diffusion dialysis membrane module of the present invention; figure 2 A schematic diagram of the central tube of a double-pass spiral-wound diffusion dialysis membrane module is given. A fixed blocking plate 8 is installed in the middle of the center tubes 1 and 3, and the center tubes 1 and 3 are divided into left and right parts, namely 1B and 1A and 3B and 3A; an ion exchange sheet is sandwiched between the two center tubes 1 and 3 Membrane 2 and two flow channel partitions 4 and 5, so that the two flow channel partitions 4 and 5 are respectively arranged on both sides of the ion exchange membrane 2, keeping the central tube 1 and 3 as the boundary, and the lengths of the ion exchange membranes at both ends are equal, and the The ion excha...
Embodiment 2
[0037] Example 2: Recovery of Industrial Titanium White Waste Acid by Two-pass Spiral-Wound Diffusion Dialysis Membrane Module
[0038] Use as attached Figure 5 The waste acid recovery performance test device of the double-pass spiral-wound diffusion dialysis membrane module shown in , uses the double-pass spiral-wound diffusion dialysis membrane module 13 in Example 1 to carry out the waste acid recovery process test, simulating industrial titanium white waste acid liquid, prepared H 2 SO 4 / FeSO 4 Feed liquid samples, the concentrations are shown in Table 1:
[0039] Table 1H 2 SO 4 / FeSO 4 Concentration of Feed Liquid Sample
[0040]
[0041] Inject waste acid and tap water of equal volume into waste acid head tank 14 and water head tank 15 respectively, adjust acid and water flow, maintain the flow ratio of waste acid and tap water to be about 1-2, keep the liquid level, after being stabilized, Measure the concentration of sulfuric acid and ferrous sulfate in t...
Embodiment 3
[0045] Example 3: Recovery of foil waste liquid by double-pass spiral-wound diffusion dialysis membrane modules
[0046] Using the dual-pass spiral-wound diffusion dialysis membrane module 13 in Example 1 to simulate the recovery process test of foil waste liquid, prepare HCl / AlCl 3 Feed liquid samples, the concentrations are shown in Table 3:
[0047] Table 3 HCl / AlCl 3 Concentration of Feed Liquid Sample
[0048]
[0049] Inject waste acid and tap water of equal volume into waste acid head tank 14 and water head tank 15 respectively, adjust acid and water flow, maintain the flow ratio of waste acid and tap water to be about 0.9-1.2, keep liquid level, after being stabilized, Measure the concentration of hydrochloric acid and aluminum chloride in residual acid and recovered acid, and calculate H + Recovery rate, Al 3+ leak rate etc. Determination of AlCl by complexometric titration 3 For the concentration of aluminum ions in the solution, the concentration of hydroge...
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